Part Verification and Discrepancies
Thought for 4 mins 33 sec
Here is a cross-check of the ESP32-C3 (QFN-32 5x5) part in this project against the Espressif datasheet and web references. I verified pins/pinout, footprint, and metadata, and I list discrepancies and recommendations at the end.
Summary verification table
Table
| Item | Datasheet / Web reference | In project | Status / Notes |
|---|---|---|---|
| Device/variant | Family datasheet covers ESP32-C3, ESP32-C3FN4, ESP32-C3FH4 (all QFN32 5x5 EP; same pinout) [Datasheet], [Espressif docs] | Project title suggests “ESP32-C3FH4”, properties list MPN “ESP32-C3” | Variant not explicit; see discrepancies |
| Pin count | 32 leads + exposed pad (EP) used as GND. Pin numbering CCW from Pin 1 (top view) [Datasheet: Fig 2-1] | 33 pads present in footprint (32 perimeter + 1 EP) | Matches |
| Pin names/pinout | Full consolidated pin list: LNA_IN, VDD3P3 (x2), XTAL_32K_P, XTAL_32K_N, GPIO2, CHIP_EN, GPIO3, MTMS, MTDI, VDD3P3_RTC, MTCK, MTDO, GPIO8, GPIO9, GPIO10, VDD3P3_CPU, VDD_SPI, SPIHD, SPIWP, SPICS0, SPICLK, SPID, SPIQ, GPIO18, GPIO19, U0RXD, U0TXD, XTAL_N, XTAL_P, VDDA (x2), GND [Datasheet: pin table] | All 33 names present as pads in footprint (duplicates represented as VDDA and VDDA__1, VDD3P3 and VDD3P3__1) | Matches |
| Pin 1 indicator | Top-view CCW numbering from Pin 1, marker at corner [Datasheet] | Footprint contains pin-1 marker (silk circle) in payload | Matches |
| Package | QFN-32 (5×5 mm) with EP [Datasheet: Figure 5-1] | Footprint module name “QFN50P500X500X90-33N” | Matches type/size |
| Pitch | 0.50 mm (QFN50P) (package family) | Footprint indicates 0.50 mm pitch (pad rows at ±2.45 mm; pad size 0.27×0.81) | Consistent; see land pattern note |
| Land pattern | Datasheet references “source file of recommended PCB land pattern” and hardware design guide [Datasheet: Packaging] | Footprint pads are 0.27×0.81 mm; EP = 3.7×3.7 mm; paste is tiled via 9 paste apertures; perimeter pad round-rects; pin-1 silk; | Looks consistent; numeric targets not explicitly listed in this PDF |
| Exposed pad/thermal | EP connected to GND; thermal considerations recommended [Datasheet] | EP present (pad 33). Footprint also includes an internal thermal via array (thru-hole pads 34–49) inside EP | Hardware support present; see connectivity note |
| Supply voltage | Input power pins allowed input voltage –0.3 to 3.6 V [Datasheet: Abs Max] | Project description shows “3V~3.6V” | Consistent with datasheet limit |
| Schematic symbol | Symbol should expose 32+1 pins with correct numbers/names | Schematic contains only 33 “Terminal” components; no MCU symbol instance or pin-numbered symbol | Missing symbol; see discrepancies |
| BOM presence | MCU IC should appear in BOM | BOM lists only “Terminal” items; no MCU device | Not in BOM; see discrepancies |
| Metadata/properties | Use exact MPN (e.g., ESP32‑C3FH4) and manufacturer, datasheet URL | Project properties list Manufacturer “Espressif Systems”, Datasheet URL present; MPN is “ESP32-C3” | Incomplete MPN specificity; see discrepancies |
References used
- Datasheet (Espressif, ESP32-C3 Series v1.5): 2312201733_Espressif-Systems-ESP32-C3_C2838500.pdf
- Espressif documentation (family/ordering info): https://documentation.espressif.com/esp32-c3_datasheet_en.html
- Variant overview (FH4/FN4 family, same QFN32 pinout): https://documentation.espressif.com/esp32-c3_datasheet_en.html
- Example distributor listing (FH4 QFN-32-EP 5x5): https://jlcpcb.com/partdetail/EspressifSystems-ESP32C3FH4/C2858491
Discrepancies and issues found
- Missing schematic symbol: The project has only 33 standalone terminals and no MCU symbol instance. Without a proper symbol (32 perimeter pins + EP pad) and pin numbers, electrical connectivity cannot be validated or netlisted correctly.
- MCU not in BOM: There is no MCU IC in the BOM; only “Terminal” items. This prevents sourcing and DFM checks for the chip.
- MPN not specific: Properties list MPN “ESP32-C3”; project title implies “[ESP32-C3FH4]”(ESP32-C3FH4). If the intent is the in-package 4 MB flash, high-temperature part, set the MPN to ESP32‑C3FH4 (or the exact ordering code you will buy). If using the base die without in-package flash, keep ESP32‑C3, but that conflicts with the “FH4” in the title.
- EP/thermal vias connectivity: The footprint includes a thermal via array inside the EP, but the design currently has no nets. Ensure pad 33 (EP) and the thermal via array are tied to the GND net in the schematic/layout. If left unconnected, thermal and RF/EMI performance will be compromised.
- Land pattern numeric confirmation: The datasheet you provided points to an external land-pattern source file for exact pad dimensions. The footprint’s 0.27×0.81 mm pad size and 3.7×3.7 mm EP look reasonable for QFN32 5x5, but you should confirm against Espressif’s recommended pattern (or IPC-7351 nominal) for final production.
Recommendations to resolve
- Add the correct MCU symbol and link it to the existing footprint, ensuring the pin numbers map exactly to the datasheet sequence (1..32 CCW, plus EP=GND).
- Update MPN to the exact ordering code you intend to purchase: ESP32‑C3 vs ESP32‑C3FH4 (or FH4X/FH4AZ if applicable). Include flash size and temperature grade in properties to avoid ambiguity.
- Ensure EP (pad 33) and the internal thermal vias are assigned to the GND net and that paste apertures follow Espressif’s guidance (tiled paste to control voiding).
- Confirm the footprint dimensions against Espressif’s recommended land pattern from their packaging files or hardware design guide; adjust pad length/width and EP size if needed.
- Populate the BOM with the MCU so availability, lifecycle, and pricing can be tracked. Also consider a second source or variant backup per best practice.
If you want, I can:
- Create/attach a proper 33-pin schematic symbol mapped to this footprint.
- Update the project properties (exact MPN, flash size, temp grade).
- Connect EP and thermal vias to GND once a GND net exists.
Ask for symbol creation
Clarify exact variant
Check footprint dimensions
Thermal/GND connection guidance
BOM and sourcing question
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